1Cr11Ni2W2MoV不锈钢气体渗氮工艺研究  

Study on gas nitriding process of 1Cr11Ni2W2MoV stainless steel

作　　者：王铮 王大宏 张金卓 孙小琪 王占鸿 晁耀杰 费岩晗 WANG Zheng;WANG Dahong;ZHANG Jinzhuo;SUN Xiaoqi;WANG Zhanhong;CHAO Yaojie;Fei Yanhan(Dalian Changfeng Industrial Corporation,Dalian 116038,Liaoning,China)

机构地区：[1]大连长丰实业总公司,辽宁大连116038

出　　处：《金属加工（热加工）》2024年第6期23-28,共6页MW Metal Forming

基　　金：辽宁省应用基础研究项目(2023JH2/101300211);大连市优秀青年科技人才项目(2023RY014)。

摘　　要：研究了1Cr11Ni2W2MoV马氏体不锈钢气体渗氮工艺参数对试样尺寸变化的影响,讨论了固溶冷却介质对其钝化膜形成与气体渗氮的影响。通过光学显微镜、扫描电镜和X-ray衍射仪分析了渗氮层组织和物相,利用显微硬度计检测了其硬度,采用中性盐雾试验评价了钝化膜形成能力。结果表明:1Cr11Ni2W2MoV不锈钢固溶油淬时,其中性盐雾试验24h时发生表面锈蚀现象。在600℃×12h气体渗氮时,渗氮层由Fe_(2-3)N与Fe_(4)N相为主和少量CrN相组成,渗层硬度950HV0.1以上,渗层厚度≥260μm。采用固溶水淬时,中性盐雾试验72h未发现表面锈蚀现象,其渗层深≤10µm,表明固溶快速冷却有利于提升马氏体不锈钢表面钝化膜形成能力。The influence of gas nitriding process parameters on the size change of 1Cr11Ni2W2MoV martensitic stainless steel was studied,and the influence of solid solution cooling medium on the formation of passivation film and gas nitriding was discussed.The microstructure and phase of the nitrided layer were analyzed using optical microscopy,scanning electron microscopy,and X-ray diffraction.Its hardness was measured using microhardness,and the ability to form a passive film was evaluated using neutral salt spray experiments.The results showed that surface corrosion occurred during the 24 hour salt spray test of 1Cr11Ni2W2MoV stainless steel during solid solution oil quenching.When gas nitriding is carried out at 600℃for 12 hours,the nitriding layer is mainly composed of Fe_(2-3)N and Fe_(4)N phases,as well as a small amount of CrN phase.The hardness of the nitriding layer is above 950HV0.1,and the thickness of the nitriding layer is≥260μm.When using solid solution water quenching,no surface rust phenomenon was found in the neutral salt spray test for 72 hours,and the depth of the infiltration layer was≤10μm,indicating that rapid solid solution cooling is beneficial for improving the ability of passive film formation on the surface of martensitic stainless steel.

关 键 词：1CR11NI2W2MOV钢 马氏体不锈钢 渗氮 钝化膜 变形量 

分 类 号：TG156.82[金属学及工艺—热处理]